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Safety Performance Measures. Numbers? Rates? Trends?. ATSIP July 2009. Thomas M. Welch, P.E. State Transportation Safety Engineer Office of Traffic and Safety Iowa Department of Transportation 515 239-1267 [email protected] Reduce the national fatality rate from 1.48 to 1.0

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safety performance measures

Safety Performance Measures

Numbers?

Rates?

Trends?

ATSIP

July 2009

Thomas M. Welch, P.E.

State Transportation Safety Engineer

Office of Traffic and Safety

Iowa Department of Transportation

515 239-1267

[email protected]

slide3
Fatality Rates per 100 Million VMT – 2002

US Avg. = 1.50

1.01

1.20

0.81

1.47

2.60

1.32

1.20

1.26

0.86

1.86

1.37

1.14

2.12

1.95

1.28

1.03

1.54

1.31

1.03

1.64

1.31

1.11

1.09

2.12

1.34

1.34

1.27

2.19

1.70

1.40

1.18

1.80

1.77

1.95

1.23

1.70

1.72

1.33

DC

1.61

2.18

2.13

2.23

1.97

1.41

1.80

2.43

1.69

2.02

1.78

1.76

0.00 to 1.50

1.50 to 2.61

1.34

PR

VI

slide4
Fatality Rates Can Be Misleading

2.12

SD

1.27

CA

South Dakota’s roads

are safer

than California’s

2006 fatality rates
2006 Fatality Rates

National Iowa Difference

Overall 1.41 1.40 None

Rural

Roads 2.30 1.80 -22%

Urban

Streets 0.95 0.80 -16%

slide7
(1.30) to zero

zero to 0.83

Expected Fatality Rates (Weighted by Distribution of VMT)

Compared to Actual Fatality Rates

(0.76)

(0.16)

(1.26)

(0.54)

0.64

(0.65)

(0.46)

(0.39)

(0.30)

0.06

(0.39)

(0.25)

0.19

(0.08)

0.13

(0.23)

(0.07)

(0.02)

(0.52)

(0.17)

(0.17)

(0.17)

0.81

(0.57)

(0.29)

(0.02)

0.02

0.05

0.23

0.29

(0.33)

0.10

0.19

0.21

(0.15)

0.01

0.29

DC

0.17

(0.06)

0.79

0.23

0.30

0.44

(0.18)

0.12

0.46

0.23

0.34

0.19

0.41

(0.10)

Puerto Rico

Virgin Islands

current goal
Current Goal

Reduce fatalities by 1/3 from ~ 43,000 to 29,000/ year

safety performance measures safety performance measures

Safety Performance Measures Safety Performance Measures

Numbers?

Rates?

Trends?

Thomas M. Welch, P.E.

State Transportation Safety Engineer

Office of Traffic and Safety

Iowa Department of Transportation

515 239-1267

[email protected]

ATSIP

July 2009

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